/Engine/Source/Runtime/Engine/Public/Animation/SkeletalMeshVertexAttribute.h
bool AddAttribute ( const [FName](API\Runtime\Core\UObject\FName) InName, const ESkeletalMeshVertexAttributeDataType InDataType, const int32 InNumVertices, const int32 InComponentCount, const [TArray](API\Runtime\Core\Containers\TArray)< float > & InValues )